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Given a pair of images, a stereoscopic display should execute the image plane calibration, the depth map estimation, and the multiple views rendering to show a 3-D picture. Among all signal processing stages, the depth estimation is the most critical one. This paper presents a real-time depth map estimation algorithm as well as parallel software architecture based on a GPU processor. The experimental...
This paper presents a signal processing pipeline of rendering multiple views for autostereoscopic video displays. This system converts two-view videos into multiple views through video rectification, depth map estimation, and multiple views rendering.
Color and shape descriptions of an image are the most widely used visual features in content-based image retrieval systems. Feature vectors for shape and color can be combined to improve the performance of the content-based image retrieval systems. In this paper, a novel image retrieval method integrating HSV color quantization and curve let transform is proposed. By analyzing properties of HSV(Hue,...
This paper addresses an error concealment technique, focusing on motion vector (MV) recovery for inter-coded frames, to improve video quality at decoder when video bit stream data are incurred transmission errors. The proposed algorithm considers slice (i.e., a row of macroblocks (MBs)) errors and uses DP (Dynamic Programming) optimization technique to estimate the lost MVs in a combined manner, differing...
This paper describes an approach for extracting words, textlines and text blocks by analyzing the spatial configuration of connected domain and word contour rectangles on a given document image. The basic idea is that connected components of black pixels and contours can be used as computational units in document image analysis. In this paper, we try to find a spatial feature and overlapped relationships...
This study proposes a novel application of MAS (Multi-agent System) framework for edge detection, which the edge definition is derived from the compositive behavior of the gradients of different sample distance. The edge feature can be regarded as an extension of traditional gradient-based methods by the product of gradient magnitude on different distance. And then MAS is employed to obtain the maximal...
This paper presents a robust signal processing pipeline for three-dimensional (3-D) stereoscopic cameras. Given a pair of images captured by dual cameras, the pipeline performs the image plane calibration, depth map estimation, and multiple views rendering to produce a 3-D picture. The illusion of the object distance in the image is created by multiple views of image and equipped with a lenticular...
This paper presents a template-based facial caricature generation approach. Since the major difficulty in generating facial caricature automatically is the uniqueness of individuals and the polymorphism of features, a modified active shape model (ASM) is first designed to locate key feature points accurately by using 2D local grey-level structures. Then, extracted facial components are classified...
Embedded video surveillance has become a large market as the number of installed cameras around us can show. At the same time, video compression technique has been rapidly developed in recent years. As a new generation of video coding compression standard, extensive attention has been given to H.264/AVC. On the other hand, because of good cost-effective and low-power consumption, DSP is widely used...
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